the standby command

• The description below references the sband tx code in  /home/phil/vw/datatk/sband/723_1may97/AO. The online routines are in 723_1may97. I've written these routines (not complete) and placed them in ./AO/. The major changes were to move all of the status variables to a structure so that it was easier to read the code.
• Variables in the program are in bold italics.  The St. status values have mm_nn . The mm is the byte position in the database screen where this variable appears. _nn is the bit mask for this bit.
  

• Main loop: (723.c)
  
• dochio() eventually gets all the characters stby and returns bufRdy.
• docmd() is called to process the command
• standby() is called. This starts the standby processing going.
• seqdecode():
• Standby() requires a sequence of commands. When standby starts, the comseq variable is set to 4. Each time thru the main loop seqdecode() branches on comseq=4 to recall the standby() routine to continue the processing.
• standby(): (in control9.c)
• on first entry comseq <-4, trynum<-0. On succeeding calls from seqdecode(), trynum is incremented. If trynum = 6 then the standby attempt fails with COMMAND FAIL. trynum<-0, and comseq<0.
• standby sequence. This is executed in order on each call to standby (first or seqdecode).
• coolDwnTmr_c52=0; sets cool down timer to zero
• if !st.gen.sumFlwPrf_38_20 cooling summary flow proofs missing.
• cooling(1). start coolling and return to main loop.
• if(!st.ttiDI.filContPrf_20_10)  digital input filament contactor proof missing
• This comes from the hvps building tti12 xa2 sch:190154 bit 13
• The proof is a combination (and) of:
• filamentCmd  tto(13,11,1)  sent from computer program
• This is filament(1) routine to request to turn on filaments
• Filament ready sch 190235 sh3 (2nd from left fiber optic input into pin 75 of chip)
• comes from FO line originating in dome 190152 sh zone E3. filament ready.
• (see also filament timer on previous page).
  
• filament(1)   start filament turn on. Return to main loop.
•  if(st.ttiDI.kly1Sel_8_1 and not st.ttiDI.kly1MagContPrf_20_20) kly1 selected and kly1 magnet contactor proof missing
• magnet(1) . start kly1 magnet. return to main loop
• kly1MagContPrf  come from a contactor for kly1 in the hvps building:
  
• sch:190154-sh2:p1-8 ->j1-6 |190235-sh1 chips|->j3-4->p3->10
  
• if(st.ttiDI.kly2Sel_8_2 and not st.ttiDI.kly2MagContPrf_20_40) kly2 selected and kly2 magnet contactor proof missing
• magnet(2) . start kly2   magnet. return to main loop
• print STANDBY on the console..
• Standby lite on the main screen.
• this turns on when dome Hv Ready is true and hv OFF  is true.
  
• hot crowbar test.
• respond().
• The program keeps the current status, and the last one we displayed on the screen.
• If the screen status has the ground switch down, and the current status has the ground switch pulled up , then ask if they want the hot crowbar test.
  

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